package com.cn.xml;



public class calculator {


    public int add(int a, int b) {
        return a + b;
    }

    public int sub(int a, int b) {
        return a - b;
    }

    public int mul(int a, int b) {
        return a * b;
    }

    public int div(int a, int b) {
        return a / b;

    }
}
